Pretty game and a pretty cool idea! :D
The art definitely stands out. I like how butterflies look like and how they navigate towards flowers. Making the wing flapping effect by changing the shade of pixels was super clever and looks awesome! (BTW - what was the name of background asset pack? I think I would like to use it maybe with a bit of a twist at some point :D).
My biggest problem was figuring out how to increase the yield (which is imo the core of idle/clicker games). I cut down the intrusive plants, got most of the ground covered with the yellow plants and that gave me ~+20 NC/s plus whatever butterflies gave when landing on flowers (it's a pity I didn't get a feedback on how much NC butterflies yield). I wasn't sure if I should cut down dried out plants for the majority of my run (did they pop their seeds already? Much later on I figured out I actually have to cut down dried out plants). In principle I couldn't get past the 20NC/s threshold. I also didn't particularly like the fact that the yield got worse over time when I didn't attend the garden (but that's maybe because I was expecting more of an idle game rather than a clicker, so that comment may be fully disregarded :D). I also don't know why the same butterflies were worth ~30 at the beginning and ~150 towards the end of a run. What did I do to bring their value up?
Gameplay wise I also did not like that there's butterfly identification cooldown. On one hand the game is more of a clicker game, forcing me to be active while attending the garden. On the other it forces me to be idle because I can catch only 5 butterflies and then I have to wait for 90s or so. But the butterfly-catching minigame was fun! I wish there was more species but it's fully understandable that jam games are limited content-wise ;)
I also really missed the music. Even a simple lo-fi beat would add sooooo much to the overall feeling of cozy butterfly garden. But SFX were good!
There were some small issues that had impact on my gameplay:
1. I didn't win after catching the blue butterfly
2. Blue flowers gave me +5 when pollinated by butterflies, while yellow ones gave me +10. That was NOT expected given price difference between packs ;)
3. UI fell apart a bit on my end - I couldn't see other emails, text was falling out of the designated boxes. When on full screen I couldn't see the bottom panel with tools so I had to play in a windowed mode
4. I've got +105NC for a blue butterfly but +155 for a yellow one? What's up with the rarity then? ;)
5. I couldn't cut down leaves from the tree, nor buy them nor I saw any butterflies landing there. Maybe it's just not implemented yet.
While these comments may sound negative, please keep in mind that these are all solvable issues! The core of the game is unique, has it's charm and I think that with a bit more time this game would reach it's potential ;) And once again - the implemented system of butterflies wandering and landing of flowers is super satisfying to watch!